Παραπομπή APA

E.Blackwood Dr.Paul, E.Etter Richard, M.Garrels Dr.Robert, & Mckown Stephens Margaret. (1962). The world and its wonders.( Kỳ quan thế giới). Chicago: The Childs world.

Παραπομπή Chicago Style

E.Blackwood Dr.Paul, E.Etter Richard, M.Garrels Dr.Robert, και Mckown Stephens Margaret. The World and Its Wonders.( Kỳ Quan Thế Giới). Chicago: The Childs world, 1962.

Παραπομπή MLA

E.Blackwood Dr.Paul, E.Etter Richard, M.Garrels Dr.Robert, και Mckown Stephens Margaret. The World and Its Wonders.( Kỳ Quan Thế Giới). Chicago: The Childs world, 1962.

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